Home / 1,635.11-2,451.41-812.75

Finding the Fourth Proportional to 1,635.11, 2,451.41 and 812.75

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Solution

The fourth proportional to 1,635.11, 2,451.41 and 812.75 is: 1,218.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,635.11 : 2,451.41 = 812.75 : x
  2. Step 2: Convert to fraction form
    1,635.11/2,451.41 = 812.75/x
  3. Step 3: Cross multiply
    1,635.11x = 2,451.41 × 812.75
  4. Step 4: Simplify right side
    1,635.11x = 1,992,383.48
  5. Step 5: Solve for x
    x = 1,992,383.48/1,635.11
  6. Step 6: Final answer
    x = 1,218.50

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.